Used my cs200 for the first time on the road today. It displayed speed for most of the ride, but intermittently displayed "0.0" (and I was moving, not fast, but I was moving). Polar instructions suggest electromagnetic interference but I didn't see anything that would cause that. Any insights/suggestions?

Used my cs200 for the first time on the road today. It displayed speed for most of the ride, but intermittently displayed "0.0" (and I was moving, not fast, but I was moving). Polar instructions suggest electromagnetic interference but I didn't see anything that would cause that. Any insights/suggestions?

Operator- thanks, I looked and adjusted it, maybe it will help. While doing that, I noticed that the magnet from a prior computer was nearby, so I removed it. Maybe the sensor was picking up two signals? Thanks for your help. salv2112